JP3404492B2 - Compressor operation control method and compressor operation control device - Google Patents
Compressor operation control method and compressor operation control deviceInfo
- Publication number
- JP3404492B2 JP3404492B2 JP09044098A JP9044098A JP3404492B2 JP 3404492 B2 JP3404492 B2 JP 3404492B2 JP 09044098 A JP09044098 A JP 09044098A JP 9044098 A JP9044098 A JP 9044098A JP 3404492 B2 JP3404492 B2 JP 3404492B2
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- Prior art keywords
- compressor
- air
- operation control
- time
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Description
【0001】[0001]
【発明の属する技術分野】本発明は、複数の圧縮機を運
転制御し、圧縮機の吐出空気を空気槽にまとめ、所定圧
力範囲の圧縮空気源として供給する為の圧縮機運転制御
方法及び圧縮機運転制御装置の改良に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compressor operation control method and a compressor for controlling the operation of a plurality of compressors, collecting discharge air from the compressors in an air tank, and supplying the compressed air as a compressed air source in a predetermined pressure range. The present invention relates to improvement of a machine operation control device.
【0002】[0002]
【従来の技術】複数の圧縮機を運転制御し、圧縮機の吐
出空気を空気槽にまとめ、所定圧力範囲の圧縮空気源と
して供給する為の圧縮機運転制御装置は、例えば、図1
に示すような圧縮空気供給装置において使用される。こ
の圧縮空気供給装置は、1号機から6号機迄の6台の圧
縮機1〜6の吐出空気を空気配管9により一旦空気槽7
にまとめて貯め、空気槽7に貯められた圧縮空気は、工
場設備21等の動力用、計器用及び雑用等に供給され
る。圧縮機1〜6は、空気槽7内の圧縮空気の圧力が、
図9(a)に示すように、例えば6.0〜6.4kg/
cm2 の所定範囲に収まるように、それぞれ断続的に運
転制御される。2. Description of the Related Art A compressor operation control device for controlling the operation of a plurality of compressors, collecting discharge air from the compressors in an air tank, and supplying the compressed air as a compressed air source in a predetermined pressure range is shown in FIG.
It is used in a compressed air supply device as shown in FIG. In this compressed air supply device, the discharge air of the six compressors 1 to 6 from No. 1 to No. 6 is once supplied to the air tank 7 through the air pipe 9.
The compressed air that has been collectively stored in the air tank 7 and is stored in the air tank 7 is supplied to the factory equipment 21 and the like for power, instruments and chores. In the compressors 1 to 6, the pressure of the compressed air in the air tank 7 is
As shown in FIG. 9A, for example, 6.0 to 6.4 kg /
The operation is intermittently controlled so as to be within a predetermined range of cm 2 .
【0003】この運転制御は、圧力取出弁13を介して
圧力取出配管8及び計器用配管14により、圧力センサ
11が検出した空気槽7内の圧力に基づいて行われる。
圧力センサ11が検出した圧力値は、同じ制御盤10内
にある圧縮機運転制御装置12に与えられる。圧縮機運
転制御装置12は、与えられた圧力値が上述した所定範
囲に収まるように、圧縮機1〜6をそれぞれ起動、ロー
ド(空気を送り出す)、アンロード(運転中であるが空
気を送り出さない)又は停止の何れかに、所定の順序に
従って運転制御する。This operation control is performed based on the pressure in the air tank 7 detected by the pressure sensor 11 through the pressure extraction valve 13, the pressure extraction pipe 8 and the instrument pipe 14.
The pressure value detected by the pressure sensor 11 is given to the compressor operation control device 12 in the same control panel 10. The compressor operation control device 12 starts, loads (sends out air), and unloads (sends air even though the compressor is in operation) so that the given pressure value falls within the above-mentioned predetermined range. The operation is controlled according to a predetermined order, either "no" or stopped.
【0004】図8は、圧縮機を起動制御する場合の従来
の圧縮機運転制御装置12の動作を示すフローチャート
である。圧縮機運転制御装置12は、圧力センサ11が
検出した空気槽7内の圧力値を読み込み(S20)、空
気槽7内の圧縮空気の所定圧力範囲の下限許容値6.0
kg/cm2 の余裕を見込んだ設定値6.1kg/cm
2 と比較する(S22)。その結果、読み込んだ圧力値
が設定値以下であったときは、順序に従って、停止中の
圧縮機の内の1台を起動させ(但し、アンロード中の圧
縮機が無いとき)、タイマーを起動させる(S24)。FIG. 8 is a flow chart showing the operation of the conventional compressor operation control device 12 in the case of controlling the start of the compressor. The compressor operation control device 12 reads the pressure value in the air tank 7 detected by the pressure sensor 11 (S20), and determines the lower limit allowable value 6.0 of the predetermined pressure range of the compressed air in the air tank 7.
A set value of 6.1 kg / cm that allows for a margin of kg / cm 2.
It is compared with 2 (S22). As a result, when the read pressure value is less than the set value, one of the stopped compressors is started according to the order (however, when there is no compressor being unloaded) and the timer is started. (S24).
【0005】このタイマーは、当該圧縮機の起動からロ
ードが可能になる迄に必要な時間を計る為のもので、タ
イマーがその時間を計時したときは(S26)、当該圧
縮機にロードを開始させる(S28)。圧縮機運転制御
装置12は、読み込んだ圧力値と設定値とを比較して、
読み込んだ圧力値が設定値以下でないときは(S2
2)、次にサンプリングした圧力値を読み込む(S2
0)。This timer is for measuring the time required from the start of the compressor to the time when it can be loaded. When the timer measures the time (S26), the loading of the compressor is started. (S28). The compressor operation control device 12 compares the read pressure value and the set value,
If the read pressure value is not less than the set value (S2
2) Next, read the sampled pressure value (S2
0).
【0006】[0006]
【発明が解決しようとする課題】上述したような複数の
圧縮機を備える圧縮空気供給装置においては、省エネル
ギー効果を図る為には、圧縮機のモータの容量は大きい
方が良いが、その為には、モータ起動は時間が掛かるス
ター/デルタ起動を行わなければならない。また、圧縮
機では、ロードはモータの全負荷運転可能状態において
行われる。その為、圧縮機が起動してから空気吐出が可
能な状態になる迄に、例えば、15〜30秒の時間が必
要である。In the compressed air supply apparatus having a plurality of compressors as described above, it is preferable that the capacity of the motor of the compressor is large in order to achieve an energy saving effect. The motor start-up must be star / delta start-up, which is time consuming. Further, in the compressor, loading is performed in a state where the motor can be operated under full load. Therefore, it takes, for example, 15 to 30 seconds from the start of the compressor to the state where air can be discharged.
【0007】ところが、図9(b)に示すように、空気
槽内の圧縮空気の圧力低下の変化が緩慢なときは、圧縮
機が起動してから空気吐出が可能な状態になる迄の時間
が掛かっても、下限許容値6.0kg/cm2 以下にな
ることはないが、圧力低下の変化が急激なときは、下限
許容値を大幅に割り込み(例えば、5.8kg/cm 2
迄低下)、空気供給に支障を来すことがある。本発明
は、上述したような事情に鑑みてなされたものであり、
空気槽内の圧縮空気の圧力低下の緩急に関わらず、安定
した空気供給を行える圧縮機運転制御方法及び圧縮機運
転制御装置を提供することを目的とする。However, as shown in FIG.
If the pressure drop of compressed air in the tank changes slowly, compress it.
Time from when the machine starts up until when air can be discharged
Lower limit value 6.0 kg / cm2Below
However, if the pressure drop changes rapidly, the lower limit
Significantly interrupt the allowable value (for example, 5.8 kg / cm 2
The air supply may be hindered. The present invention
Is made in view of the above-mentioned circumstances,
Stable regardless of the speed of pressure drop of compressed air in the air tank
Compressor operation control method and compressor operation capable of supplying stable air
An object is to provide a rolling control device.
【0008】[0008]
【課題を解決するための手段】本発明に係る圧縮機運転
制御方法及び圧縮機運転制御装置では、図7に示すよう
に、空気槽内の所定時間当たりの圧力変化(線分a,b
の傾きに相当)を求め、空気槽内の圧力が、所定圧力範
囲の下限(6.0kg/cm2 )に到達する時間を予測
し、予測した時間が、圧縮機が起動してから空気吐出が
可能な状態になる迄の時間に余裕を持たせた時間taよ
り短いときに、停止中の圧縮機の起動させる。時間ta
が持つ余裕は、圧力変化のサンプリング周期を考慮して
定められる。In the compressor operation control method and the compressor operation control apparatus according to the present invention, as shown in FIG. 7, a pressure change (line segments a, b) within a predetermined time in the air tank.
Of the air pressure), predicting the time when the pressure in the air tank reaches the lower limit (6.0 kg / cm 2 ) of the predetermined pressure range, When it is shorter than the time ta that allows a sufficient time until the state becomes possible, the stopped compressor is started. Time ta
The allowance of is determined in consideration of the sampling cycle of pressure change.
【0009】第1発明に係る圧縮機運転制御方法は、複
数の圧縮機のそれぞれの起動/停止を行い、該圧縮機の
吐出空気を空気槽にまとめ、所定圧力範囲の圧縮空気源
として供給する為の圧縮機運転制御方法において、前記
空気槽内の所定時間当たりの圧力変化を演算し、演算し
た所定時間当たりの圧力変化により前記空気槽内の圧力
が前記所定圧力範囲の下限に到達する時間を演算予測
し、演算予測した時間が所定時間より短いときは、停止
中の圧縮機を起動させることを特徴とする。In the compressor operation control method according to the first aspect of the present invention, each of a plurality of compressors is started / stopped, and the discharge air of the compressors is collected in an air tank and supplied as a compressed air source in a predetermined pressure range. In the compressor operation control method for calculating the pressure change in the air tank per predetermined time, the time in which the pressure in the air tank reaches the lower limit of the predetermined pressure range by the calculated pressure change per predetermined time Is predicted, and when the predicted time is shorter than a predetermined time, the stopped compressor is activated.
【0010】第2発明に係る圧縮機運転制御方法は、前
記所定時間は、前記停止中の圧縮機が起動してから空気
を吐出することが可能となる迄の時間より長くしてある
ことを特徴とする。In the compressor operation control method according to the second aspect of the present invention, the predetermined time period is longer than the time period from the start of the stopped compressor to the discharge of air. Characterize.
【0011】第3発明に係る圧縮機運転制御装置は、複
数の圧縮機のそれぞれの起動/停止を行い、該圧縮機の
吐出空気を空気槽にまとめ、所定圧力範囲の圧縮空気源
として供給する為の圧縮機運転制御装置において、前記
空気槽内の所定時間当たりの圧力変化を演算する手段
と、該手段が演算した所定時間当たりの圧力変化によ
り、前記空気槽内の圧力が前記所定圧力範囲の下限に到
達する時間を演算予測する手段と、該手段が演算予測し
た時間と所定時間とを比較する手段と、該手段の比較結
果が、演算予測した時間が所定時間より短いときに、停
止中の圧縮機を起動させる手段とを備えることを特徴と
する。A compressor operation control device according to a third aspect of the present invention starts / stops each of a plurality of compressors, collects discharge air of the compressors in an air tank, and supplies the compressed air as a compressed air source in a predetermined pressure range. In the compressor operation control device for calculating the pressure change in the air tank for a predetermined time, the pressure in the air tank is changed to the predetermined pressure range by the pressure change for a predetermined time calculated by the means. Means for calculating and predicting the time to reach the lower limit of, and means for comparing the time calculated and predicted by the means with a predetermined time, and stopping when the comparison result of the means is shorter than the predetermined time Means for activating the compressor therein.
【0012】第1発明に係る圧縮機運転制御方法及び第
3発明に係る圧縮機運転制御装置では、演算する手段
が、空気槽内の所定時間当たりの圧力変化を演算し、演
算予測する手段が、その演算した所定時間当たりの圧力
変化により、空気槽内の圧力が所定圧力範囲の下限に到
達する時間を演算予測する。比較する手段は、演算予測
した時間と所定時間とを比較し、その比較結果が、演算
予測した時間が所定時間より短いときに、起動させる手
段が、停止中の圧縮機を起動させる。これにより、空気
槽内の圧力が所定圧力範囲の下限より低くなることがな
く、空気槽内の圧縮空気の圧力低下の緩急に関わらず、
安定した空気供給を行うことができる。In the compressor operation control method according to the first aspect of the invention and the compressor operation control device according to the third aspect of the invention, the calculating means calculates the pressure change per predetermined time in the air tank, and calculates and predicts the change. Based on the calculated pressure change per predetermined time, the time for the pressure in the air tank to reach the lower limit of the predetermined pressure range is calculated and predicted. The comparing means compares the operation-predicted time with a predetermined time, and when the comparison result indicates that the operation-predicted time is shorter than the predetermined time, the activating means activates the stopped compressor. With this, the pressure in the air tank does not become lower than the lower limit of the predetermined pressure range, regardless of whether the pressure of the compressed air in the air tank gradually decreases or decreases.
A stable air supply can be performed.
【0013】第4発明に係る圧縮機運転制御装置は、複
数の圧縮機のそれぞれを、所定の順序に従って、運転中
の空気吐出、運転中の空気非吐出又は停止の何れかに運
転制御し、前記圧縮機の吐出空気を空気槽にまとめ、所
定圧力範囲の圧縮空気源として供給する為の圧縮機運転
制御装置において、運転中の空気非吐出である圧縮機の
有無を判定する手段と、該手段が無と判定したときに、
前記空気槽内の所定時間当たりの圧力変化を演算する手
段と、該手段が演算した所定時間当たりの圧力変化によ
り、前記空気槽内の圧力が前記所定圧力範囲の下限に到
達する時間を演算予測する手段と、該手段が演算予測し
た時間と所定時間とを比較する手段と、該手段の比較結
果が、演算予測した時間が所定時間より短いときに、前
記所定の順序に従って、停止中の圧縮機を起動させた
後、空気吐出を行わせる手段とを備えることを特徴とす
る。A compressor operation control device according to a fourth aspect of the present invention controls the operation of each of the plurality of compressors according to a predetermined order to either discharge air during operation, not discharge air during operation, or stop. In a compressor operation control device for collecting the discharge air of the compressor in an air tank and supplying it as a compressed air source in a predetermined pressure range, means for determining the presence or absence of a compressor that is not discharging air during operation, When there is no means,
A means for calculating a pressure change per predetermined time in the air tank, and a time when the pressure in the air tank reaches a lower limit of the predetermined pressure range is calculated and predicted by the pressure change per predetermined time calculated by the means. Means for comparing the time predicted by the means with a predetermined time, and a comparison result of the means when the time predicted for the calculation is shorter than the predetermined time according to the predetermined order. Means for ejecting air after the machine is started.
【0014】第4発明に係る圧縮機運転制御装置では、
判定する手段が、運転中の空気非吐出である圧縮機の有
無を判定し、判定する手段が無と判定したときに、演算
する手段が、空気槽内の所定時間当たりの圧力変化を演
算し、演算予測する手段が、その演算した所定時間当た
りの圧力変化により、空気槽内の圧力が所定圧力範囲の
下限に到達する時間を演算予測する。比較する手段は、
その演算予測した時間と所定時間とを比較し、その比較
結果が、演算予測した時間が所定時間より短いときに、
所定の順序に従って、行わせる手段が、停止中の圧縮機
を起動させた後、空気吐出を行わせる。これにより、空
気槽内の圧力が所定圧力範囲の下限より低くなることが
なく、空気槽内の圧縮空気の圧力低下の緩急に関わら
ず、安定した空気供給を行うことができる。In the compressor operation control device according to the fourth invention,
The judging means judges the presence or absence of the compressor that is not discharging air during operation, and when the judging means judges that there is no compressor, the calculating means calculates the pressure change in the air tank per predetermined time. The calculation and prediction means calculates and predicts the time for the pressure in the air tank to reach the lower limit of the predetermined pressure range based on the calculated pressure change per predetermined time. The means to compare is
The calculated predicted time is compared with a predetermined time, and when the comparison result is that the calculated predicted time is shorter than the predetermined time,
According to a predetermined order, the means for performing the operation causes the compressor that is stopped to be activated, and then causes the air to be discharged. As a result, the pressure in the air tank does not become lower than the lower limit of the predetermined pressure range, and stable air supply can be performed irrespective of the gradual decrease in the pressure of the compressed air in the air tank.
【0015】第5発明に係る圧縮機運転制御装置は、前
記所定時間は、前記停止中の圧縮機が起動してから空気
を吐出することが可能となる迄の時間より長くしてある
ことを特徴とする。In the compressor operation control device according to the fifth aspect of the present invention, the predetermined time period is longer than the time period from the start of the stopped compressor to the discharge of air. Characterize.
【0016】第2発明に係る圧縮機運転制御方法及び第
5発明に係る圧縮機運転制御装置では、所定時間は、停
止中の圧縮機が起動してから空気を吐出することが可能
となる迄の時間より長くしてあるので、空気槽内の圧力
が所定圧力範囲の下限より低くなる前に、新たに起動し
た圧縮機が空気を吐出し始めることができ、空気槽内の
圧縮空気の圧力低下の緩急に関わらず、安定した空気供
給を行うことができる。In the compressor operation control method according to the second aspect of the invention and the compressor operation control device according to the fifth aspect of the invention, for a predetermined time, it is possible to discharge air after the stopped compressor is activated. Since it is longer than the time of, the newly started compressor can start discharging air before the pressure in the air tank becomes lower than the lower limit of the predetermined pressure range. A stable air supply can be performed regardless of the speed of decrease.
【0017】[0017]
【発明の実施の形態】以下に、本発明をその実施の形態
を示す図面に基づき説明する。図1は、本発明に係る圧
縮機運転制御方法及び圧縮機運転制御装置の実施の形態
を使用する圧縮空気供給装置の構成を示すブロック図で
ある。この圧縮空気供給装置は、1号機から6号機迄の
6台の圧縮機1〜6の吐出空気を空気配管9により一旦
空気槽7にまとめて貯め、空気槽7に貯められた圧縮空
気は、工場設備21等の動力用、計器用及び雑用等に供
給される。圧縮機1〜6は、空気槽7内の圧縮空気の圧
力が、図4に示すように、所定範囲の上限値H及び下限
値Lの間に収まるように、それぞれ断続的に運転制御さ
れる。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings showing the embodiments thereof. FIG. 1 is a block diagram showing a configuration of a compressed air supply device using an embodiment of a compressor operation control method and a compressor operation control device according to the present invention. In this compressed air supply device, the discharge air of the six compressors 1 to 6 from No. 1 to No. 6 is temporarily stored together in the air tank 7 by the air pipe 9, and the compressed air stored in the air tank 7 is It is supplied to the factory equipment 21, etc. for power, instruments, and chores. Each of the compressors 1 to 6 is intermittently controlled so that the pressure of the compressed air in the air tank 7 falls between the upper limit value H and the lower limit value L of a predetermined range, as shown in FIG. .
【0018】この運転制御は、圧力取出弁13を介して
圧力取出配管8及び計器用配管14により、圧力センサ
11が検出した空気槽7内の圧力に基づいて行われる。
圧力センサ11が検出した圧力値は、同じ制御盤10内
にある、本発明に係る圧縮機運転制御装置12aに与え
られる。圧縮機運転制御装置12aは、与えられた圧力
値が上述した所定範囲に収まるように、圧縮機1〜6を
それぞれ起動、ロード(空気を送り出す)、アンロード
(運転中であるが空気を送り出さない)又は停止の何れ
かに、所定の順序に従って運転制御する。This operation control is performed based on the pressure in the air tank 7 detected by the pressure sensor 11 through the pressure extraction valve 13, the pressure extraction pipe 8 and the instrument pipe 14.
The pressure value detected by the pressure sensor 11 is given to the compressor operation control device 12a according to the present invention, which is in the same control panel 10. The compressor operation control device 12a starts, loads (sends air), and unloads (sends air while operating) the compressors 1 to 6 so that the given pressure value falls within the predetermined range described above. The operation is controlled according to a predetermined order, either "no" or stopped.
【0019】図2は、本発明に係る圧縮機運転制御装置
12aの実施の形態の構成を示すブロック図である。こ
の圧縮機運転制御装置12aは、マイクロコンピュータ
のCPU18と、CPU18から起動/停止されるタイ
マー20と、CPU18と各圧縮機1〜6との間の各運
転制御信号/監視信号を出力し/入力されるCPU18
のI/Oポート16と、I/Oポート16に接続され、
操作者が種々の設定、警報停止/リセット及び手動の運
転操作等を行う操作部19と、I/Oポート16に接続
され、種々の設定、運転内容及び警報等を表示出力する
表示部17と、圧力センサ11が検出した空気槽7内の
圧力に応じて出力した、例えば4〜20mAのアナログ
電流信号をディジタル信号に変換し、I/Oポート16
に入力するA/D変換器15とを備えている。FIG. 2 is a block diagram showing the configuration of an embodiment of the compressor operation control device 12a according to the present invention. The compressor operation control device 12a outputs / inputs a CPU 18 of a microcomputer, a timer 20 started / stopped by the CPU 18, and operation control signals / monitoring signals between the CPU 18 and the compressors 1-6. CPU 18
Connected to the I / O port 16 of
An operating unit 19 for an operator to perform various settings, alarm stop / reset, and manual operation, and a display unit 17 connected to the I / O port 16 for displaying and outputting various settings, operation contents, alarms, and the like. , The analog current signal of, for example, 4 to 20 mA output according to the pressure in the air tank 7 detected by the pressure sensor 11 is converted into a digital signal, and the I / O port 16
And an A / D converter 15 for inputting to the.
【0020】以下に、このような構成の圧縮機運転制御
装置12aが圧縮機1〜6を運転制御する動作を説明す
る。圧縮機運転制御装置12aが圧縮機1〜6を運転制
御する場合の、空気槽7内の設定圧力は、例えば図3に
示すように設定されている。空気槽7内の通常運転範囲
Hレベル〜Lレベルは0.2kg/cm2 の幅を有し、
Hレベルより0.1kg/cm2 高いHHレベルとLレ
ベルより0.1kg/cm2 低いLLレベルとの間は通
常制御範囲である。HHレベルとHHレベルより0.3
kg/cm2高いHHHレベルとの間及びLLレベルと
LLレベルより0.3kg/cm2 低いLLLレベルと
の間は緊急制御範囲とされ、空気槽7内の圧力がHHH
レベルに到達したときは上限警報が、LLLレベルに到
達したときは下限警報がそれぞれ表示部17から出力さ
れる。The operation of the compressor operation control device 12a having such a configuration to control the operation of the compressors 1 to 6 will be described below. The set pressure in the air tank 7 when the compressor operation control device 12a controls the operation of the compressors 1 to 6 is set as shown in FIG. 3, for example. The normal operating range H level to L level in the air tank 7 has a width of 0.2 kg / cm 2 .
A normal control range is between an HH level 0.1 kg / cm 2 above the H level and an LL level 0.1 kg / cm 2 below the L level. 0.3 from HH level and HH level
between 0.3 kg / cm 2 less LLL levels than during and LL level and LL level with kg / cm 2 higher HHH level is an emergency control range, the pressure in the air tank 7 is HHH
The upper limit alarm is output when the level is reached, and the lower limit alarm is output when the LLL level is reached.
【0021】圧縮機運転制御装置12aは、空気槽7内
の通常運転範囲Hレベル〜Lレベルでは、例えば図4に
示すように、圧力が上昇してHレベルに到達すると、ロ
ード中の圧縮機から、所定の順序に従って、1台をアン
ロードさせる。一方、圧力が低下してLレベルに到達
すると、アンロード中の圧縮機から、所定の順序に従っ
て、1台をロードさせる。但し、1台以上の圧縮機が
アンロードである場合に、圧力が上昇してHレベルに到
達すると、ロード中の圧縮機から、所定の順序に従っ
て、1台をアンロードさせ、圧縮機の内の主機(停止予
定機)を停止させる。アンロード中の圧縮機が無い場
合は、演算した所定時間当たりの圧力変化から、Lレベ
ルに到達する時間を演算予測し、Lレベルに到達しない
ように、ロード中の圧縮機から、所定の順序に従って、
1台を起動させた後ロードさせる。In the normal operation range H level to L level in the air tank 7, the compressor operation control device 12a, when the pressure rises and reaches the H level as shown in FIG. 4, for example, the compressor being loaded. Then, one is unloaded according to a predetermined order. On the other hand, when the pressure drops and reaches the L level, one compressor is loaded from the unloading compressor in a predetermined order. However, when the pressure rises and reaches the H level when one or more compressors are unloaded, one of them is unloaded according to a predetermined order from the compressor being loaded. Stop the main engine (scheduled to stop). When there is no compressor being unloaded, the time to reach the L level is calculated and predicted from the calculated pressure change per predetermined time, and a predetermined order is given from the compressor being loaded so as not to reach the L level. According to
Load one after starting one.
【0022】図5は、圧縮機を起動制御する場合の圧縮
機運転制御装置12aの動作を示すフローチャートであ
る。圧縮機運転制御装置12aは、アンロード中の圧縮
機が存在するか否かを判定し(S1)、アンロード中の
圧縮機が存在すると判定したときはリターンし、他の制
御動作を実行する。圧縮機運転制御装置12aは、アン
ロード中の圧縮機が存在しないと判定したときは(S
1)、圧力センサ11が検出した空気槽7内の圧力値
を、所定個数読み込み(S2,S4)、所定時間当たり
の圧力変化を演算する(S6)。FIG. 5 is a flow chart showing the operation of the compressor operation control device 12a when controlling the start-up of the compressor. The compressor operation control device 12a determines whether or not there is a compressor that is being unloaded (S1), and when it is determined that there is a compressor that is being unloaded, returns and executes another control operation. . When the compressor operation control device 12a determines that the unloading compressor does not exist (S
1), a predetermined number of pressure values in the air tank 7 detected by the pressure sensor 11 are read (S2, S4), and the pressure change per predetermined time is calculated (S6).
【0023】このとき、例えば図6に示すように、圧力
値の読み込み(サンプリング)を0.2秒毎に5回行
い、その圧力変化の平均の1.0秒(所定時間)分を演
算する。つまり、読み込んだ圧力値を読み込み順にA,
B,C,D,Eとすると、
(((A−B)+(B−C)+(C−D)+(D−
E))/0.2)/5=A−E
となり、結局、1.0秒毎にサンプリングを行って、圧
力変化を演算していることと同様である。尚、0.2秒
毎に圧力変化の1.0秒分(圧力変化/秒)を演算する
ようにしても良い。At this time, for example, as shown in FIG. 6, reading (sampling) of the pressure value is performed 5 times every 0.2 seconds, and 1.0 second (predetermined time) of the average of the pressure change is calculated. . In other words, the read pressure values are read in the order A,
Assuming B, C, D, and E, (((A−B) + (B−C) + (C−D) + (D−
E)) / 0.2) / 5 = AE, which is the same as calculating the pressure change by sampling every 1.0 seconds. It should be noted that 1.0 second of pressure change (pressure change / second) may be calculated every 0.2 second.
【0024】次に、圧縮機運転制御装置12aは、演算
した(S6)1.0秒当たりの圧力変化により、通常運
転範囲の下限許容値Lレベルに到達する時間を演算する
(S8)。このとき、(E−L)/(A−E)を演算し
(S8)、図6に示すように、(E−L)/(A−E)
≦ta(秒)となったときは(S10)、所定の順序に
従って、停止中の圧縮機の内の1台を起動させ、タイマ
ーを起動させる(S12)。taは、停止中の圧縮機が
起動してから空気を吐出すること(ロード)が可能とな
る迄の時間に余裕を持たせた時間である。Next, the compressor operation control device 12a calculates the time for reaching the lower limit allowable value L level of the normal operation range by the calculated pressure change per 1.0 second (S6) (S8). At this time, (E−L) / (A−E) is calculated (S8), and as shown in FIG. 6, (E−L) / (A−E)
When ≦ ta (seconds) (S10), one of the stopped compressors is started and the timer is started (S12) according to a predetermined order. ta is a time allowed for the time from the start of the stopped compressor to the time when it is possible to discharge (load) air.
【0025】圧縮機運転制御装置12aは、タイマー
が、停止中の圧縮機が起動してからロードが可能となる
迄の予め定められている時間を計時したときに(S1
4)、その圧縮機をロードさせる(S16)。圧縮機運
転制御装置12aは、(E−L)/(A−E)を演算し
(S8)、(E−L)/(A−E)>taのとき又は
(E−L)/(A−E)<0のとき(負のときは圧力が
上昇している)は(S10)リターンする。The compressor operation control device 12a causes the timer to measure a predetermined time from the start of the stopped compressor until the load becomes possible (S1).
4) The compressor is loaded (S16). The compressor operation control device 12a calculates (E−L) / (A−E) (S8), and when (E−L) / (A−E)> ta, or (E−L) / (A). When −E) <0 (when the pressure is negative, the pressure is increasing), the process returns (S10).
【0026】ここで、例えば、ta;10秒,E;6.
1kg/cm2 ,A;6.11kg/cm2 ,L;6.
0kg/cm2 のとき、
(6.1−6.0)/(6.11−6.1)=10(=
ta)
となって、圧縮機を起動させる。一方、例えば、ta;
10秒,E;6.15kg/cm2 ,A;6.16kg
/cm2 ,L;6.0kg/cm2 のとき、
(6.15−6.0)/(6.16−6.15)=15
(>ta)
となって、圧縮機を起動させない。Here, for example, ta; 10 seconds, E; 6.
1kg / cm 2, A; 6.11kg / cm 2, L; 6.
At 0 kg / cm 2 , (6.1-6.0) / (6.11-6.1) = 10 (=
ta) and start the compressor. On the other hand, for example, ta;
10 seconds, E; 6.15 kg / cm 2 , A; 6.16 kg
/ Cm 2, L; when 6.0kg / cm 2, (6.15-6.0) / (6.16-6.15) = 15
(> Ta) and the compressor is not started.
【0027】[0027]
【発明の効果】第1発明に係る圧縮機運転制御方法及び
第3,4発明に係る圧縮機運転制御装置によれば、空気
槽内の圧力が所定圧力範囲の下限より低くなることがな
く、空気槽内の圧縮空気の圧力低下の緩急に関わらず、
安定した空気供給を行うことができる。According to the compressor operation control method of the first invention and the compressor operation control device of the third and fourth inventions, the pressure in the air tank does not become lower than the lower limit of the predetermined pressure range. Regardless of the speed of pressure drop of compressed air in the air tank,
A stable air supply can be performed.
【0028】第2発明に係る圧縮機運転制御方法及び第
5発明に係る圧縮機運転制御装置によれば、空気槽内の
圧力が所定圧力範囲の下限より低くなる前に、新たに起
動した圧縮機が空気を吐出し始めることができ、空気槽
内の圧縮空気の圧力低下の緩急に関わらず、安定した空
気供給を行うことができる。According to the compressor operation control method of the second aspect of the invention and the compressor operation control device of the fifth aspect of the invention, the newly activated compression is performed before the pressure in the air tank becomes lower than the lower limit of the predetermined pressure range. The machine can start discharging air, and a stable air supply can be performed regardless of the speed of the pressure drop of the compressed air in the air tank.
【図1】 圧縮空気供給装置の構成を示すブロック図で
ある。FIG. 1 is a block diagram showing a configuration of a compressed air supply device.
【図2】 本発明に係る圧縮機運転制御装置の実施の形
態の構成を示すブロック図である。FIG. 2 is a block diagram showing a configuration of an embodiment of a compressor operation control device according to the present invention.
【図3】 本発明に係る圧縮機運転制御装置が圧縮機を
運転制御する場合の、空気槽内の設定圧力を説明する為
の説明図である。FIG. 3 is an explanatory diagram for explaining a set pressure in the air tank when the compressor operation control device according to the present invention controls the operation of the compressor.
【図4】 本発明に係る圧縮機運転制御装置が圧縮機を
運転制御する動作を説明する為の説明図である。FIG. 4 is an explanatory diagram for explaining an operation of controlling the operation of the compressor by the compressor operation control device according to the present invention.
【図5】 本発明に係る圧縮機運転制御装置が圧縮機を
起動制御する場合の動作を示すフローチャートである。FIG. 5 is a flowchart showing an operation when the compressor operation control device according to the present invention controls startup of the compressor.
【図6】 本発明に係る圧縮機運転制御装置の動作を説
明する為の説明図である。FIG. 6 is an explanatory diagram for explaining the operation of the compressor operation control device according to the present invention.
【図7】 本発明に係る圧縮機運転制御装置の動作を説
明する為の説明図である。FIG. 7 is an explanatory diagram for explaining the operation of the compressor operation control device according to the present invention.
【図8】 従来の圧縮機運転制御装置が圧縮機を起動制
御する場合の動作を示すフローチャートである。FIG. 8 is a flowchart showing an operation when a conventional compressor operation control device controls startup of a compressor.
【図9】 従来の圧縮機運転制御装置が圧縮機を運転制
御する動作を説明する為の説明図である。FIG. 9 is an explanatory diagram for explaining the operation of the conventional compressor operation control device for controlling the operation of the compressor.
1〜6 圧縮機 7 空気槽 11 圧力センサ 12a 圧縮機運転制御装置 16 I/Oポート 18 CPU 1-6 compressor 7 air tank 11 Pressure sensor 12a Compressor operation control device 16 I / O ports 18 CPU
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平10−30574(JP,A) 特開 平6−249190(JP,A) 特開 昭61−112788(JP,A) (58)調査した分野(Int.Cl.7,DB名) F04B 49/06 ─────────────────────────────────────────────────── ─── Continuation of front page (56) References JP 10-30574 (JP, A) JP 6-249190 (JP, A) JP 61-112788 (JP, A) (58) Field (Int.Cl. 7 , DB name) F04B 49/06
Claims (5)
行い、該圧縮機の吐出空気を空気槽にまとめ、所定圧力
範囲の圧縮空気源として供給する為の圧縮機運転制御方
法において、 前記空気槽内の所定時間当たりの圧力変化を演算し、演
算した所定時間当たりの圧力変化により前記空気槽内の
圧力が前記所定圧力範囲の下限に到達する時間を演算予
測し、演算予測した時間が所定時間より短いときは、停
止中の圧縮機を起動させることを特徴とする圧縮機運転
制御方法。1. A compressor operation control method for starting / stopping each of a plurality of compressors, collecting discharge air of the compressors in an air tank, and supplying the compressed air as a compressed air source in a predetermined pressure range, The pressure change per predetermined time in the air tank is calculated, and the time when the pressure inside the air tank reaches the lower limit of the predetermined pressure range is calculated and predicted by the calculated pressure change per predetermined time, and the calculated and predicted time is calculated. A compressor operation control method, which starts a stopped compressor when the time is shorter than a predetermined time.
起動してから空気を吐出することが可能となる迄の時間
より長くしてある請求項1記載の圧縮機運転制御方法。2. The compressor operation control method according to claim 1, wherein the predetermined time period is longer than a time period from when the stopped compressor is started to when air can be discharged.
行い、該圧縮機の吐出空気を空気槽にまとめ、所定圧力
範囲の圧縮空気源として供給する為の圧縮機運転制御装
置において、 前記空気槽内の所定時間当たりの圧力変化を演算する手
段と、該手段が演算した所定時間当たりの圧力変化によ
り、前記空気槽内の圧力が前記所定圧力範囲の下限に到
達する時間を演算予測する手段と、該手段が演算予測し
た時間と所定時間とを比較する手段と、該手段の比較結
果が、演算予測した時間が所定時間より短いときに、停
止中の圧縮機を起動させる手段とを備えることを特徴と
する圧縮機運転制御装置。3. A compressor operation control device for starting / stopping each of a plurality of compressors, collecting discharge air from the compressors in an air tank, and supplying the compressed air as a compressed air source in a predetermined pressure range, A means for calculating a pressure change within a predetermined time in the air tank, and a time when the pressure in the air tank reaches the lower limit of the predetermined pressure range is calculated and predicted by the pressure change per predetermined time calculated by the means. Means, means for comparing the operation-predicted time with the predetermined time, and means for activating the stopped compressor when the comparison result of the means is shorter than the predetermined time for the operation-predicted time. A compressor operation control device comprising:
に従って、運転中の空気吐出、運転中の空気非吐出又は
停止の何れかに運転制御し、前記圧縮機の吐出空気を空
気槽にまとめ、所定圧力範囲の圧縮空気源として供給す
る為の圧縮機運転制御装置において、 運転中の空気非吐出である圧縮機の有無を判定する手段
と、該手段が無と判定したときに、前記空気槽内の所定
時間当たりの圧力変化を演算する手段と、該手段が演算
した所定時間当たりの圧力変化により、前記空気槽内の
圧力が前記所定圧力範囲の下限に到達する時間を演算予
測する手段と、該手段が演算予測した時間と所定時間と
を比較する手段と、該手段の比較結果が、演算予測した
時間が所定時間より短いときに、前記所定の順序に従っ
て、停止中の圧縮機を起動させた後、空気吐出を行わせ
る手段とを備えることを特徴とする圧縮機運転制御装
置。4. The operation control of each of the plurality of compressors is performed according to a predetermined order to either discharge air during operation, non-discharge air during operation, or stop, and discharge air from the compressor into an air tank. In summary, in a compressor operation control device for supplying as a compressed air source in a predetermined pressure range, means for determining the presence or absence of a compressor that is not discharging air during operation, and when the means determines that there is no A means for calculating a pressure change within a predetermined time in the air tank, and a time when the pressure in the air tank reaches the lower limit of the predetermined pressure range is calculated and predicted by the pressure change per predetermined time calculated by the means. And a means for comparing the operation-predicted time by the means with a predetermined time, and when the comparison result of the means is shorter than the predetermined time for the operation-predicted time, the compressor being stopped according to the predetermined order. After launching Compressor operation control apparatus characterized by comprising: means for causing the air discharge.
起動してから空気を吐出することが可能となる迄の時間
より長くしてある請求項3又は4記載の圧縮機運転制御
装置。5. The compressor operation control device according to claim 3, wherein the predetermined time period is longer than a time period from when the stopped compressor is activated until air can be discharged. .
Priority Applications (1)
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JP09044098A JP3404492B2 (en) | 1998-04-02 | 1998-04-02 | Compressor operation control method and compressor operation control device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP09044098A JP3404492B2 (en) | 1998-04-02 | 1998-04-02 | Compressor operation control method and compressor operation control device |
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JPH11287188A JPH11287188A (en) | 1999-10-19 |
JP3404492B2 true JP3404492B2 (en) | 2003-05-06 |
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ID=13998684
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JP09044098A Expired - Lifetime JP3404492B2 (en) | 1998-04-02 | 1998-04-02 | Compressor operation control method and compressor operation control device |
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US7722331B2 (en) * | 2005-09-30 | 2010-05-25 | Hitachi, Ltd. | Control system for air-compressing apparatus |
DE102008064491A1 (en) * | 2008-12-23 | 2010-06-24 | Kaeser Kompressoren Gmbh | Simulation-based method for controlling or regulating compressed air stations |
JP5374188B2 (en) * | 2009-02-20 | 2013-12-25 | 株式会社Ihi | Compressor number control system |
JP5646282B2 (en) * | 2010-10-29 | 2014-12-24 | アネスト岩田株式会社 | Compressor and operation control method thereof |
CN102003377A (en) * | 2010-11-23 | 2011-04-06 | 北京时代科仪新能源科技有限公司 | Control device and method for air compressor |
KR101790545B1 (en) | 2013-02-08 | 2017-10-26 | 가부시키가이샤 히다치 산키시스템 | Fluid compression system and control device therefor |
JP6539319B2 (en) * | 2017-08-28 | 2019-07-03 | 株式会社日立産機システム | Fluid compression system or controller thereof |
CN111771057B (en) * | 2018-09-27 | 2022-08-23 | 株式会社日立产机*** | Gas compressor and control method thereof |
CN114382687B (en) * | 2022-02-24 | 2022-11-08 | 蘑菇物联技术(深圳)有限公司 | Method, apparatus and medium for controlling air compressor in air compression station |
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